Patent · US Active

Differential cylinder for a hydromechanical drive for electrical circuit breakers

US9920777B2 · kind B2 · utility

0Cited by

9References

21Claims

0Family size

Assignee

ABB Schweiz AG · CH

Inventors

Thomas Brenneis · Mainaschaff, DE
Matthias Schmidt · Munich, DE
Henrik Lohrberg · Frankfurt am Main, DE
Frank Fiedler · Aachen, DE
Bruno Gehlert · Eitorf, DE
Roland Palm · Wright Lane, SE

Key dates

Filing date	Feb 3, 2014
Grant date	Mar 20, 2018
Priority date	—
Expiry date	Mar 4, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH01H33/34
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A differential cylinder for a hydromechanical drive for actuating an electrical switch, for example a high-voltage switch, is disclosed which includes a first pressure region for applying a working pressure, a second pressure region, and a piston which is capable of moving in a movement region and which is movable depending on a pressure difference between the first and second pressure region. A damping device is provided which, in the event of a movement of the piston in the direction of the second pressure region, provides damping with respect to the movement of the piston in a section of the movement region, wherein the damping is adjustable.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.